CVE-2026-22815
Received Received - Intake
Memory Exhaustion via Header Handling in AIOHTTP Before

Publication date: 2026-04-01

Last updated on: 2026-04-06

Assigner: GitHub, Inc.

Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, insufficient restrictions in header/trailer handling could cause uncapped memory usage. This issue has been patched in version 3.13.4.
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Meta Information
Published
2026-04-01
Last Modified
2026-04-06
Generated
2026-06-16
AI Q&A
2026-04-02
EPSS Evaluated
2026-06-15
NVD
CVE-2026-22815
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
aiohttp aiohttp to 3.13.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-770 The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.
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Executive Summary

This vulnerability exists in AIOHTTP, an asynchronous HTTP client/server framework for asyncio and Python. Before version 3.13.4, there were insufficient restrictions in how headers and trailers were handled, which could lead to uncapped memory usage.

Impact Analysis

The vulnerability can cause the application using AIOHTTP to consume an unlimited amount of memory due to improper handling of headers and trailers. This could lead to performance degradation, crashes, or denial of service.

Mitigation Strategies

To mitigate this vulnerability, update AIOHTTP to version 3.13.4 or later, where the issue with insufficient restrictions in header/trailer handling causing uncapped memory usage has been patched.

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